1 //===-- Implementation of ctime function ----------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "src/time/ctime.h" 10 #include "src/__support/CPP/limits.h" 11 #include "src/__support/common.h" 12 #include "src/__support/macros/config.h" 13 #include "src/time/time_constants.h" 14 #include "src/time/time_utils.h" 15 16 namespace LIBC_NAMESPACE_DECL { 17 18 LLVM_LIBC_FUNCTION(char *, ctime, (const time_t *t_ptr)) { 19 if (t_ptr == nullptr || *t_ptr > cpp::numeric_limits<int32_t>::max()) { 20 return nullptr; 21 } 22 static char buffer[time_constants::ASCTIME_BUFFER_SIZE]; 23 return time_utils::asctime(time_utils::localtime(t_ptr), buffer, 24 time_constants::ASCTIME_MAX_BYTES); 25 } 26 27 } // namespace LIBC_NAMESPACE_DECL 28